<!DOCTYPE html>
<html lang="en" xmlns:th="http://www.thymeleaf.org">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
<form action="/user/modify" method="post">
  <input type="text" th:value="${user.username}" name="username"><br>
  <input type="text" th:value="${user.password}" name="password"><br>
  <input type="submit" value="提交">
</form>
</body>
</html>